Overview of two-year observations with SIGMA on board GRANAT

Details Overview of two-year observations with SIGMA on board GRANAT Overview of two-year observations with SIGMA on board GRANAT

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26as...97....1m&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 97, no. 1, p. 1-4.

Astronomy and Astrophysics

Astronomy

7

Gamma Ray Astronomy, Gamma Ray Telescopes, Sky Surveys (Astronomy), Spaceborne Astronomy, Astronomical Maps, Emission Spectra, Energy Spectra, Galactic Nuclei, Milky Way Galaxy, X Ray Binaries

Scientific paper

The hard X-ray, low-energy gamma-ray telescope SIGMA, one of the main instruments on board the Soviet satellite GRANAT, has performed sky observations in the 35 keV-1.3 MeV range both on galactic and extragalactic objects with unprecedent angular resolution in such an energy domain. New results have been obtained by mapping the Galactic Center region with a 1.6 arc minute accuracy during more than 500 hours distributed in five periods which took place in early Spring and fall Summer from 1990 to 1992. Hard X-ray binaries and bright extragalactic objects have also been analyzed and monitored during these observations. The main result obtained by SIGMA was to point out the variability of the sky in the hard X-ray domain.

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